(meteorobs) Origin of ZHR?

[Julian Parks]

Rich,

If you have a copy of Sedgwick's, "Observational Astronomy for Amateurs," either the 1955/1957 edition or the fourth edition there is a reference to Meteor Counts and Hourly Rates in Section 15.5 and to Zenithal Hourly Rate, and Zenithal Magnitude in Section 15.6 and a Bibliography for E. Opik, J.G. Porter, C.P. Oliver, et. al. who researched this area.  From the Bibliography the dates I see referred to are 1920, 1921, 1923, 1930, 1931.  These cites are from the Harvard Circ. and ``Journal of the British Astronomical Association among others.  There is also mentioned in Section 15.5 statistical work in the mid-nineteenth century by a Gravier and Schmidt.  Whatever that statistical work is I do not know.  Sounds like a trip to the library.

Hope this helps.

Julian Parks
Rego Park, NY
 
----- Original Message ----- 
From: "Richard Taibi" <rjtaibi at hotmail.com>
To: <meteorobs at meteorobs.org>
Sent: Friday, May 11, 2007 9:02 PM
Subject: (meteorobs) Origin of ZHR?


> Does anyone know who developed the concept of the Zenithal Hourly Rate, and 
> when it was proposed?
> 
> Thanks!
> 
> Rich
> 
> 
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